Showing posts with label Fasteners. Show all posts
Showing posts with label Fasteners. Show all posts

American National Standard of Small and Large Rivets

American National Standard Large Rivets
The types of rivets covered by this standard (ANSI B18.1.2-1972 (R1995)). It may be noted, however, that when specified, the swell neck included in this standard is applicable to all standard large rivets except the flat countersunk head and oval countersunk head types. Also shown are the hold-on (dolly bar) and rivet set impression dimensions.

All standard large rivets have fillets under the head not exceeding an 0.062-inch radius. The length tolerances for these rivets are given as follows: through 6 inches in length, 1⁄2- and 5⁄8-inch diameters, ±0.03 inch; 3⁄4- and 7⁄8-inch diameters, ±0.06-inch; and 1- through 13⁄4-inch diameters, ±0.09 inch. For rivets over 6 inches in length, 1⁄2- and 5⁄8-inch diameters, ±0.06 inch; 3⁄4- and 7⁄8-inch diameters, ±0.12 inch; and 1- through 13⁄4-inch diameters, ±0.19 inch. Steel and wrought iron rivet materials appear in ASTM  specifications A31, A131, A152, and A502.

American National Standard Large Rivets

American National Standard Small Solid Rivets
The types of rivets covered by this standard (ANSI/ASME B18.1.1-1972 (R1995)). In addition, the standard gives the dimensions of 60-degree flat countersunk head rivets used to assemble ledger plates and guards for mower cutter bars, but these are not shown. As the heads of standard rivets are not machined or trimmed, the circumference may be somewhat irregular and edges may be rounded or flat. Rivets other than countersunk types are furnished with a definite fillet under the head, whose radius should not exceed 10 percent of the maximum shank diameter or 0.03 inch, whichever is the smaller. With regard to head dimensions, tolerances shown in the dimensional tables are applicable to rivets produced by the normal cold heading process. Unless otherwise specified, rivets should have plain sheared ends that should be at right angles within 2 degrees to the axis of the rivet and be reasonably flat.

Rivets may be made of ASTM Specification A31, Grade A
steel; or may adhere to SAE Recommended Practice, Mechanical and Chemical Requirements for Nonthreaded Fasteners—SAE J430, Grade 0. When specified, rivets may be made of other materials.

ANSI/ASME B18.1.3M-1983 (R1995), Metric Small Solid Rivets, provides data for small, solid rivets with flat, round, and flat countersunk heads in metric dimensions. The main series of rivets has body diameters, in millimeters, of 1.6, 2, 2.5, 3, 4, 5, 6, 8, 10, and  12. A secondary series (nonpreferred) consists of sizes, 1, 1.2, 1.4, 3.5, 7, 9, and 11 millimeters.

American National Standard Small Solid Rivets

You may also refer to other related topics:

Rivet and Riveted Joints - classes and types of riveted joints 
Mechanical Engineering Books - useful related books


Classes and Types of Riveted Joints
Riveted joints may be classified by application as: 1) pressure vessel; 2) structural; and 3) machine member.

For information and data concerning joints for pressure vessels such as boilers, reference should be made to standard sources such as the ASME Boiler Code. The following sections will cover only structural and machine-member riveted joints.

Basically there are two kinds of riveted joints, the lap-joint and the butt-joint. In the ordinary lap-joint, the plates overlap each other and are held together by one or more rows of rivets. In the butt-joint, the plates being joined are in the same plane and are joined by means of a cover plate or butt strap, which is riveted to both plates by one or more rows of rivets. The term single riveting means one row of rivets in a lap-joint or one row on each side of a butt-joint; double riveting means two rows of rivets in a lap-joint or two rows on
each side of the joint in butt riveting. Joints are also triple and quadruple riveted. Lap-joints may also be made with inside or outside cover plates.